Alfred piedfort



(No Model.)

Patented Dec. 15, 1896.

R 0 i R E V N I W ITNESSESZ Attorney.

apparatus, or on a Hughes apparatus, or

UNITED" STATES PATENT OFF CE.

ALFRED PIEDFORT, or PARIS, FRANCE.

RECEIVER-FOR SUBMARINE TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 573,286, dated December 15, 1896. Application filed Decemberll), 1895. Serial No. 572,623. (roman) Patented it ran e l love'mber 13,1895,No.238,957.

To all whom it may concern.-

Be it known that I, ALFRED PIEDFORT, a citizen of the French Republic, residing in Paris, France, have invented certain new and useful Improvements in Receivers for Submarine Telegraphs, (for which a patent has been granted in France, No. 238,957, dated November 13, 1895,) of which the following is a specification.

. My invention relates to receivers for submarine telegraphs; and the object is to provide an apparatus which will automatically and with certainty and exactness trace on ordinary telegraphic paper the conventional signs corresponding to the direction of the current sent through the cable, and this withoutthe need of alocal electric current; also, or which will displace a sliding pin, determining with absolute exactness and certainty and whatever may be the intensity of the current which provokes its displacement a contactwhich may close-a relay on a Morse which will permit of sending the message farther on. These results are effected by the combination of the fine-wire coil of a galva nometer (a Thomson, DArsonval, or other galvanometer) with a mechanical multiplier acting on a lever-bearing, either an ordinar r siphon in the case of the automatic recording of the message without the need of a local circuit or a sliding pin having a limited displacement, which by its contact forms a relay-contact. The multiplier consists of wires or chains wound several times about a barrel having a uniform rotary motion. Each of these wires-or chains is attached at one end either directly to the coil of the galvanometer, or to it through the intermediary of a lever, andat the other end to the lever bearing the siphon" or the sliding pin. The rotating barrel on which the chains are wound is set in mo-tion by a clock mechanism, which may be actuated by a spring, by weights, or by electricity. The direction of "rotation of the barrel is such that it tends constantly to move the chains toward the coil of the galvanometer.

The invention will now be fully described with reference to the accompanying drawings, wherein- Figure 1 is a plan view of the apparatus,

and Fig. 2 is a plan of'a part of the mechanical multiplier in a construction adapted to displace a sliding pini'fw The receiver is formed in the usual way of a very sensitive galvan'ometer G, placed in the vicinity of a bog; 'B, in which is a clock .mechanism furnished with a good regulator.

This clock mechanism drives a feed-roller, which feeds along thepaper 19,} which comes from an ordinary reeLand is gripped between the said roller and an upper roller ct, which is pressed elastically t0 the feed-roller by a spring a The paper on its way to thefeeding-point passes over a guide-rollerb and then over asmall plate or table 0. The clock mechanism drives a'barrel f (arranged at right angles to the course of the paper plthrough the intermediary of toothed wheels cl, cl, 6, and

g g of the mechanical multiplier. One end of each chain is attached directly to the respective suspension-wires 7c and 70, Fig. 2, of the fine-wire coil of the galvanometer G or indirectly, that is to say,.through the medium of levers 10 as seen in Fig.2, connected with the galvanometer-coil or with its suspension- 6 About this barrel f are wound the chains wires 7a 713', through the medium of wires 70 The other ends of the chains g g are secured, respectively, to hooks Z Z, fixed to regulatingscrews m m, mounted on an oscillating or rocking lever 01.. These screws m m are placed symmetrically with reference to the fulcrum or pivot of the lever 12. This pivot is borne by a bracket 0, fixed on the box B, in line with and facing the vertical axis of the galvanometer-coil.

The longer arm of the lever n is furnished with a clamp q, which serves to embrace and hold the longer vertical branch of a siphon r, of which the shorter end dips into an inkstand u, mounted on the box. The longer branch of the siphon, drawn to a point at its end, rests in contact with the paper 19, which is drawn under itat the table 0. When the galvanometer-coil is stationary, the lever it holds the tip of the siphon r at the median line of the moving strip of paper 19.

The longer arm of the lever t may be furnished with a clamp q, (see Fig. 2,) which serves as a support and guide for a sliding contact-pin 1), which may slidefreely therein. and through the oscillations of the lever be e. in-0t paper 1M sin o brought into contact with one or the other of two contact-pieces or contact-screws w and w, mounted in the arms t on a bracket t. These arms t limit the longitudinal displacement of the pin 1;. WVhen this pin is displaced through the rocking of the lever 41 a distance greater than thatv which Separates its end from a contact w or w, it slides in its bearing in the clamp q and projects so much the farther in the opposite 'direotion in such a fashion that it will be found constantly at the proper point for establishing contact with that contact-screw which; is in connection with a ay whic permits efi" working a Hughes or Morse apparatus (in this case one of the nt ts w or ill. be Qfinsela ing material) for m lieg the mes ge farther a; The @011 (if the gel? meme-G and. parallel with. the axis at he rr' lifby thet towires. 7e. 7 atta h d, res-neQtiv-elyz to nego iatingeren t mounted. ma crossepiece en n p;- 5 ghter br eketQ- Sis-Meet the-pelepiieees off the magn A, and e a block eett iron fixed some aeket Q the; center oi the sale venemeter-eqit. The nera. .onisasfie iloa ea Theelo k; imam b ing set in m tion, the teed-to lets drawthe s 2"n0f. panel. it ever th teble e. The seen eels dz e eretate the heme niflorrehr in the ir etien Qfij the rrow in such manner tha ehains g.- g/' are lnzgedi hedireeflon ef; t e arte ies- 21); As, seen a urr nt iesent threnehtheeeblneiand eense- A qeentl-y hrough theeoiliot t, anometen e said; e011: will be slightly n1 001i n the vertical plane, of: its sn p o t with very Little v f re nene e lte 4 ens-i4 1 ile eeb isattached; ethee oi he Ion-get 214121.111v Qt he ev -l 111e, siphon being; m i-e i ces, t. one. side o the other of the in diam line e 1 f or. ie za line: eoe seep ndins ofthe semen-none the telegraphicalphabet. The p, r egative chara ter oi the ment determin wh' he side of the median LlJglQiJlfillllftQl-Hgfis with occupy. h

The p n ert i l eolaeee y the ev t teiheseleain tone.. or the: other o he serew eont et w i ee ne ede i h: e it h er stsef e ay a ter h shiftect 10 260 5 L set eed b ts hent i e am. i le-efie e lia en tnansmitted y th ev been teeneak, E ie-ea riations of'am-plitnde which, areproduoed in hen: or the pm '12, W

ways floating so as not to prednce ment of the coil about; the vertical: plane of ab out the displacement of the galvanometer-coil are thus corrected by the longitudinal play of the pin 0 in its bearings.

In the drawings the flexible connectors are represented as chains, but they may as well be wires.

Having thus described my invention, I claim 1. In a receiver for submarine telegraphs,

the combination with a galvanometer, of a mechanical multiplier comprislng a rotating barrel f, chains g, g wound about said barrel, said chains. being connected at one end to the galvanometel coil directly or indirectly, and at the other end to the operating-levern, at opposite sides out its pivot or fulcrum and aet equal distances therefrom, and the said eperatind lever w erebythe connecto s its s pport.

2'! In a reeeiyer tel? submarine telegrapns, he eemhination with means tier. fieeding a strip et record-pawn, a galwanolneter, a eon-sitan ttymota baerehyf, ot a, ver n, fule1: med nea said. helmet. ehaine g wound. said, ba rel. and. at, one end connected with said lever n at opposite; sides of its. t

t Q'ilz iazl dtistain therefirom and QULQEQIIQL to th eons of t e ga va- Item 3 and a recording-siphon, carried by remit o the e e e and adapted to Qfi pmperpassing set; forth.

1 anon-emu; and an ope ta elatieely tong; arnn Qt Wrapped abdomen thesai e 2. eenneetons being covetat; opposite; sides of: its

H e eillatiensi the coil r to: the: long: aria ot the lever 01, euhstantlali y as set. Qll li In witness whereo I. have hereuntosigned name in the presence of two'- subscribing witnesses.

AEFRETD: PIEDFORT- itne ses:

ALB-Ea PAUL lVEAULVAUL'IZ;

wrapped about theharretf' will he constant y" drawn toward the ceiloifi the-galvanem-ete in 

